<template>
  <div class="music-list">
    <div class="back"
         @click='back'>
      <i class="icon-back"></i>
    </div>
    <h1 class="title"
        v-html="title"></h1>
    <div class="bg-image"
         :style="bgStyle"
         ref='bgIMG'>
      <div class="play-wrapper">
        <div class="play"
             v-show="songs.length>0">
          <i class="icon-play"></i>select
          <span class="text">随机播放全部</span>
        </div>
      </div>
      <div class="filter"></div>
    </div>
    <div class="bg-layer">

    </div>
    <scroll :data="songs"
            class="list"
            ref="list">
      <div class="song-list-wrapper">
        <songlist :rank="rank"
                  @select="selectItem"
                  :songs="songs"></songlist>
      </div>
      <div v-show="!songs.length"
           class="loading-container">
        <loading></loading>
      </div>
    </scroll>
  </div>
</template>

<script>
import Scroll from 'base/scroll/scroll'
import Songlist from 'base/song-list/song-list'
import { mapActions } from 'vuex'
import Loading from 'base/loading/loading'

export default {
  mounted () {
    this.$refs.list.$el.style.top = `${this.$refs.bgIMG.clientHeight}px`
  },
  props: {
    bgImage: {
      type: String,
      default: ''
    },
    songs: {
      type: Array,
      default: ''
    },
    title: {
      type: String,
      default: ''
    },
    rank: {
      type: Boolean,
      default: false
    }
  },
  methods: {
    ...mapActions([
      'selectPlay'
    ]),
    back () {
      this.$router.back()
    },

    selectItem (item, index) {
      console.log(item);

      if (!item.url) {
        this.$toast.fail('没有版权');
        return
      }
      this.selectPlay({ list: this.songs, index })
    }
  },
  computed: {
    bgStyle () {
      return `background-image:url(${this.bgImage})`
    }
  },
  components: {
    Songlist,
    Scroll,
    Loading
  }
}
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
@import '~common/stylus/variable'
@import '~common/stylus/mixin'
.music-list
  position fixed
  z-index 160
  top 0
  left 0
  bottom 0
  right 0
  background $color-background
  .back
    position absolute
    top 0
    left 6px
    z-index 107
    .icon-back
      display block
      padding 10px
      font-size $font-size-large-x
      color $color-theme
  .title
    position absolute
    top 0
    left 10%
    z-index 108
    width 80%
    no-wrap()
    text-align center
    line-height 40px
    font-size $font-size-large
    color $color-text
  .bg-image
    position relative
    width 100%
    height 0
    padding-top 70%
    z-index 106
    transform-origin top
    background-size cover
    .play-wrapper
      position absolute
      bottom 20px
      z-index 50
      width 100%
      .play
        box-sizing border-box
        width 135px
        padding 7px 0
        margin 0 auto
        text-align center
        border 1px solid $color-theme
        color $color-theme
        border-radius 100px
        font-size 0
        .icon-play
          display inline-block
          vertical-align middle
          margin-right 6px
          font-size $font-size-medium-x
        .text
          display inline-block
          vertical-align middle
          font-size $font-size-small
    .filter
      position absolute
      top 0
      left 0
      width 100%
      height 100%
      background rgba(7, 17, 27, 0.4)
  .bg-layer
    position relative
    height 100%
    background $color-background
  .list
    position fixed
    top 0
    bottom 0
    width 100%
    background $color-background
    .song-list-wrapper
      padding 20px 30px
    .loading-container
      position absolute
      width 100%
      top 50%
      transform translateY(-50%)
</style>